linux-kernel - Re: [PATCH] Winchiphead 340/1: full baud rate and status/control line support

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Message-ID: <20090104121909.3e4de876@lxorguk.ukuu.org.uk>
Date:	Sun, 4 Jan 2009 12:19:09 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Tollef Fog Heen <tfheen@....no>
Cc:	linux-kernel@...r.kernel.org, werner@...nelius-consult.de,
	frank@...gswood-consulting.co.uk
Subject: Re: [PATCH] Winchiphead 340/1: full baud rate and status/control
 line support

> | 
> | This could race another set_handshake ? I'm not sure it matters and I'd
> | suggest that stuff gets fixed after this is submitted separately
> 
> What's the easiest way to fix this?

It can sleep so probably all the cases where handshake lines are updated
need to use a mutex to protect them. That will depend if any occur in the
IRQ paths in which case it gets a lot trickier.
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